<template>
  <!-- 登录页面的整体盒子 -->
  <div class="login-container">
    <!-- 登录的盒子 -->
    <div class="login-box">
      <!-- 标题的盒子 -->
      <div class="title-box"></div>
      <!-- 登录的表单区域 -->
      <el-form :model="loginForm" :rules="loginrules" ref="loginRef">
        <el-form-item prop="username" placeholder="请输入用户名">
          <el-input v-model="loginForm.username"></el-input>
        </el-form-item>
        <el-form-item prop="password" placeholder="请输入密码">
          <el-input v-model="loginForm.password"></el-input>
        </el-form-item>
        <el-button type="primary" class="login-btn" @click="login"
          >登录</el-button
        >
        <el-link type="info" @click="$router.push('/reg')">去注册</el-link>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginForm: {
        username: "",
        password: ""
      },
      loginrules: {
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" },
          {
            pattern: /^[a-zA-Z0-9]{1,10}$/,
            message: "用户名必须由1-10位字母或数字组成",
            trigger: "blur"
          }
        ],
        password: [
          { required: true, message: "请输入密码", trigger: "blur" },
          {
            pattern: /^\S{6,15}$/,
            message: "密码必须由6-15位非空字符组成",
            trigger: "blur"
          }
        ]
      }
    }
  },
  methods: {
    login() {
      // async，async相当于axios的。then
      this.$refs.loginRef.validate(async (valid) => {
        if (!valid) return
        // 发送请求
        const { data: res } = await this.$http.post(
          "/api/login",
          this.loginForm
        )
        if (res.code === 0) {
          this.$message.success("登录成功")
          // 本地存储token
          localStorage.setItem("token", res.token)
          // 跳转登录页
          this.$router.push("/")
        } else {
          // 返回登录错误信息
          this.$message.error(res.message)
        }
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login-container {
  background: url("../../assets/images/login_bg.jpg") center;
  background-size: cover;
  height: 100%;

  .login-box {
    width: 400px;
    height: 270px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    padding: 0 20px;
    box-sizing: border-box;

    .title-box {
      height: 60px;
      background: url("../../assets/images/login_title.png") center no-repeat;
    }
  }
  .login-btn {
    width: 100%;
  }
}
</style>